DuPont lists three and a half two-column pages of chemicals for which
they have determined chemical resistance of industrial strength structured
ionomer material at 21° C (70° F) and 60° C (140° F).

This exceptional range of chemical resistance coupled with ionomer's
physical strength, environmental resistance and manufacturing flexibility
makes it a natural for many challenging gasket and seal requirments.

Gilman Softlite ionomer wedge seal, or edge seal, or wiper-tip as it
is variously called is bolted to the edges of the large floating roofs
at many liquid bulk storage tank facilities.

The Softlite ionomer seal flexes upward as supply is added to the tanks
and wipes downward as inventory is drawn. The seal reduces emissions (and
inventory losses) significantly.